“The LGBT community has a higher disposable income than the average Australian,” he said. “A $650 million economic stimulus will increase demand for certain services and industries.”

The extra ceremonies and receptions would boost spending on retail, hospitality, arts and professional services, the study found.

Tourism services would benefit from more inbound and outbound couples, while State Government revenue from marriage licences and conducting on-site ceremonies would increase.

Tony Abbott's daughter Frances talks about why she's voting yes.

The West Australian

VideoTony Abbott's daughter Frances talks about why she's voting yes.

New businesses would cater to the LGBT community but most of the job creation would not be in an “obvious manner”.

“The majority of these jobs — 80 per cent of them — are likely to be indirect, or strengthen existing employment in the sectors it will impact,” Mr Liveris said. “They’ll have a growth effect of greater demand, rather than specific ‘gay wedding’ jobs.”

Florist Steph Wall, of Poppy’s Flowers in Nedlands, said they had provided blooms for same-sex commitment ceremonies in the past and would welcome the opportunity to do the same for legally binding celebrations.